Skip to content
Noroxi
NVD / CVE Program· CNA apache

CVE-2024-23672: Apache Tomcat: WebSocket DoS with incomplete closing handshake

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.3% (FIRST EPSS); higher than 83.4% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Apache Software Foundation Apache Tomcat 11.0.0-M17.

Low priority for now. Upgrade to Apache Software Foundation Apache Tomcat 11.0.0-M17 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Denial of Service via incomplete cleanup vulnerability in Apache Tomcat. It was possible for WebSocket clients to keep WebSocket connections open leading to increased resource consumption.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 or 8.5.99 which fix the issue.

MediumCVSS 6.3 · v3.1—No exploit Fix available
Published
Mar 13, 2024
Updated
Jun 17, 2026
EPSS
2.3% · 83th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
25 / 40 · 6.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-23672

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for apache records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
apachetomcat
debiandebian linux
fedoraprojectfedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache tomcat8.5.0 and later · before 8.5.99
  • apache tomcat9.0.0 and later · before 9.0.86
  • apache tomcat10.1.0 and later · before 10.1.19
  • apache tomcat11.0.0
  • debian debian linux10.0
  • fedoraproject fedora39
  • fedoraproject fedora40

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

  • Apache Software Foundation Apache Tomcat

    • 11.0.0-M1 and later · up to and including 11.0.0-M16affected · semver
    • 10.1.0-M1 and later · up to and including 10.1.18affected · semver
    • 9.0.0-M1 and later · up to and including 9.0.85affected · semver
    • 8.5.0 and later · up to and including 8.5.98affected · semver
    • 7 and later · before 8.5.0unknown · semver
    • 10.0.0-M1 and later · up to and including 10.0.27unknown · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8tomcatbefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:8tomcat-admin-webappsbefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:8tomcat-docs-webappbefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:8tomcat-el-3.0-apibefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:8tomcat-jsp-2.3-apibefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:8tomcat-libbefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:8tomcat-servlet-4.0-apibefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:8tomcat-webappsbefore 1:9.0.87-1.el8_10.1.alma.11:9.0.87-1.el8_10.1.alma.1
AlmaLinux:9tomcatbefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
AlmaLinux:9tomcat-admin-webappsbefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
AlmaLinux:9tomcat-docs-webappbefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
AlmaLinux:9tomcat-el-3.0-apibefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
AlmaLinux:9tomcat-jsp-2.3-apibefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
AlmaLinux:9tomcat-libbefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
AlmaLinux:9tomcat-servlet-4.0-apibefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
AlmaLinux:9tomcat-webappsbefore 1:9.0.87-1.el9_4.11:9.0.87-1.el9_4.1
Debian:10tomcat9before 9.0.31-1~deb10u129.0.31-1~deb10u12
Debian:11tomcat9before 9.0.43-2~deb11u109.0.43-2~deb11u10
Debian:12tomcat10before 10.1.6-1+deb12u210.1.6-1+deb12u2
Debian:12tomcat9before 9.0.70-29.0.70-2
Debian:13tomcat10before 10.1.20-110.1.20-1
Mavenorg.apache.tomcat:tomcat-websocketfrom 10.1.0-M1 · before 10.1.1910.1.19
Mavenorg.apache.tomcat:tomcat-websocketfrom 11.0.0-M1 · before 11.0.0-M1711.0.0-M17
Mavenorg.apache.tomcat:tomcat-websocketfrom 8.5.0 · before 8.5.998.5.99

+96

Same product

apache: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-24813Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTKEV
    99Now
  • CVE-2016-8735Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x beforeKEV
    96Now
  • CVE-2017-12617When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g.KEV
    92Now

Published before and after this one in the same product

  • ← EarlierCVE-2023-46589Nov 28, 2023 · Apache Tomcat: HTTP request smuggling via malformed trailer headers
    31Monitor
  • ← EarlierCVE-2024-21733Jan 19, 2024 · Apache Tomcat: Leaking of unrelated request bodies in default error page
    25Monitor
  • Later →CVE-2024-24549Mar 13, 2024 · Apache Tomcat: HTTP/2 header handling DoS
    37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Apache Software Foundation Apache Tomcat11.0.0-M17 · descriptionVendor (CNA)
almalinux:tomcat1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
almalinux:tomcat-admin-webapps1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
almalinux:tomcat-docs-webapp1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
almalinux:tomcat-el-3.0-api1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
almalinux:tomcat-jsp-2.3-api1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
almalinux:tomcat-lib1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
almalinux:tomcat-servlet-4.0-api1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
almalinux:tomcat-webapps1:9.0.87-1.el9_4.1 · AlmaLinux:9Package registry (OSV)
debian:tomcat1010.1.6-1+deb12u2 · Debian:12Package registry (OSV)
debian:tomcat99.0.70-2 · Debian:12Package registry (OSV)
Maven:org.apache.tomcat:tomcat-websocket10.1.19Package registry (OSV)
Maven:org.apache.tomcat:tomcat-websocket11.0.0-M17Package registry (OSV)
Maven:org.apache.tomcat:tomcat-websocket8.5.99Package registry (OSV)
Maven:org.apache.tomcat:tomcat-websocket9.0.86Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-websocket10.1.19Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-websocket11.0.0-M17Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-websocket8.5.99Package registry (OSV)
Maven:org.apache.tomcat.embed:tomcat-embed-websocket9.0.86Package registry (OSV)
opensuse:apache-commons-daemon1.3.4-150200.11.14.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:apache-commons-dbcp2.1.1-150200.10.8.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:apache-commons-pool22.4.2-150200.11.8.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:geronimo-specs1.2-150200.15.8.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:jakarta-taglibs-standard1.1.1-150000.4.10.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:tomcat9.0.87-150200.65.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:tomcat1010.1.20-150200.5.22.2 · openSUSE:Leap 15.5Package registry (OSV)
red hat:jws5-tomcat0:9.0.87-3.redhat_00003.1.el7jws · Red Hat:jboss_enterprise_web_server:5.8::el7Package registry (OSV)
red hat:jws5-tomcat-admin-webapps0:9.0.87-3.redhat_00003.1.el7jws · Red Hat:jboss_enterprise_web_server:5.8::el7Package registry (OSV)
red hat:jws5-tomcat-docs-webapp0:9.0.87-3.redhat_00003.1.el7jws · Red Hat:jboss_enterprise_web_server:5.8::el7Package registry (OSV)
red hat:jws5-tomcat-el-3.0-api0:9.0.87-3.redhat_00003.1.el7jws · Red Hat:jboss_enterprise_web_server:5.8::el7Package registry (OSV)

+17

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-31650411 days apartApache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame
    48Plan
  • CVE-2023-42794155 days apartApache Tomcat: FileUpload: DoS due to accumulation of temporary files on Windows
    24Monitor
  • CVE-2023-42795155 days apartApache Tomcat: Failure during request clean-up leads to sensitive data leaking to subsequent requests
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-459 · Incomplete Cleanup

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records